Where does “swyddfeydd” come from?

swyddfeydd (Welsh) comes from Welsh swyddfa, from Welsh swydd, from Middle Welsh swyð, from Proto-Brythonic *suɨð, from Latin sēdēs, from Latin sedeō, from Proto-Italic sedēō, from Proto-Indo-European sḗd- — to sit.

Ancestry of “swyddfeydd”, step by step

swyddfeydd traces back through two separate lines of ancestry.

via Welsh swyddfa

StepLanguageWordMeaning
1Welshswyddfaan office, place of business
2Welshswyddjob; office, post, position, capacity; county
3Middle Welshswyð
4Proto-Brythonic*suɨð
5Latinsēdēsseat, chair
6Latinsedeōto sit, to be seated
7Proto-Italicsedēōsit, be sitting, be seated
8Proto-Indo-Europeansḗd-to sit

via Welsh ydd

StepLanguageWordMeaning
1Welshydd
Every word from Proto-Indo-European sḗd-Every word from Proto-Italic sedēōEvery word from Latin sedeō